Gotowe bibliografie tematyczne / Dry Valleys Region

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Gotowa bibliografia na temat „Dry Valleys Region”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 1 lutego 2022

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Artykuły w czasopismach na temat "Dry Valleys Region"

Witherow, Rebecca A., W. Berry Lyons, Nancy A. N. Bertler, Kathleen A. Welch, Paul A. Mayewski, Sharon B. Sneed, Thomas Nylen, Michael J. Handley, and Andrew Fountain. "The aeolian flux of calcium, chloride and nitrate to the McMurdo Dry Valleys landscape: evidence from snow pit analysis." Antarctic Science 18, no. 4 (November 14, 2006): 497–505. http://dx.doi.org/10.1017/s095410200600054x.

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We have determined the flux of calcium, chloride and nitrate to the McMurdo Dry Valleys region by analysing snow pits for their chemical composition and their snow accumulation using multiple records spanning up to 48 years. The fluxes demonstrate patterns related to elevation and proximity to the ocean. In general, there is a strong relationship between the nitrate flux and snow accumulation, indicating that precipitation rates may have a great influence over the nitrogen concentrations in the soils of the valleys. Aeolian dust transport plays an important role in the deposition of some eleme

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Smillie, Robert W. "Suite subdivision and petrological evolution of granitoids from the Taylor Valley and Ferrar Glacier region, south Victoria Land." Antarctic Science 4, no. 1 (March 1992): 71–87. http://dx.doi.org/10.1017/s0954102092000130.

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Detailed geological mapping and geochemical analysis of early Palaeozoic granitoid plutons and dykes from the Taylor Valley and Ferrar Glacier region in south Victoria Land reveal two distinct suites. This suite subdivision-approach is a departure from previous lithology-based schemes and can be applied elsewhere in south Victoria Land. The older calc-alkaline Dry Valleys 1 suite is dominated by the compositionally variable Bonney Pluton, a flow-foliated concordant pluton with an inferred length of over 100 km. Plutons of this suite are elongate in a NW-SE direction and appear to have been sub

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Hall, B. L., G. H. Denton, and B. Overturf. "Glacial Lake Wright, a high-level Antarctic lake during the LGM and early Holocene." Antarctic Science 13, no. 1 (March 2001): 53–60. http://dx.doi.org/10.1017/s0954102001000086.

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We report evidence of a large proglacial lake (Glacial Lake Wright) that existed in Wright Valley in the McMurdo Dry Valleys region of Antarctica at the last glacial maximum (LGM) and in the early Holocene. At its highstands, Glacial Lake Wright would have stretched 50 km and covered c. 210 km2. Chronology for lake-level changes comes from 30 AMS radiocarbon dates of lacustrine algae preserved in deltas, shorelines, and glaciolacustrine deposits that extend up to 480 m above present-day lakes. Emerging evidence suggests that Glacial Lake Wright was only one of a series of large lakes to occupy

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Tang, Ya, Jiasui Xie, and Hui Sun. "Revisiting sustainable development of dry valleys in Hengduan Mountains Region." Journal of Mountain Science 1, no. 1 (February 2004): 38–45. http://dx.doi.org/10.1007/bf02919358.

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Esposito, R. M. M., S. A. Spaulding, D. M. McKnight, B. Van de Vijver, K. Kopalová, D. Lubinski, B. Hall, and T. Whittaker. "Inland diatoms from the McMurdo Dry Valleys and James Ross Island, Antarctica." Botany 86, no. 12 (December 2008): 1378–92. http://dx.doi.org/10.1139/b08-100.

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Diatom taxa present in the inland streams and lakes of the McMurdo Dry Valleys and James Ross Island, Antarctica, are presented in this paper. A total of nine taxa are illustrated, with descriptions of four new species ( Luticola austroatlantica sp. nov., Luticola dolia sp. nov., Luticola laeta sp. nov., Muelleria supra sp. nov.). In the perennially ice-covered lakes of the McMurdo Dry Valleys, diatoms are confined to benthic mats within the photic zone. In streams, diatoms are attached to benthic surfaces and within the microbial mat matrix. One species, L. austroatlantica, is found on James

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Cox, Simon C., and Andrew H. Allibone. "Petrogenesis of orthogneisses in the Dry Valleys region, South Victoria Land." Antarctic Science 3, no. 4 (December 1991): 405–17. http://dx.doi.org/10.1017/s0954102091000500.

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Granitoid gneisses intercalated with Koettlitz Group metasediments in the upper Ferrar, Taylor and Wright valleys of South Victoria Land comprise various hornblende+biotite orthogneisses and biotite orthogneisses, including the km-scale Dun and Calkin plutons. K-feldspar megacryst inclusion textures and discordant cross-cutting relationships with enclosing metasediments are interpreted as firm evidence of an intrusive origin for hornblende+biotite and biotite orthogneiss. The scale of several concordant orthogneiss bodies (including the Dun and Calkin plutons), the presence of mafic enclaves,

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Ukrainskiy, Pavel, Edgar Terekhin, Artyom Gusarov, Eugenia Zelenskaya, and Fedor Lisetskii. "The Influence of Relief on the Density of Light-Forest Trees within the Small-Dry-Valley Network of Uplands in the Forest-Steppe Zone of Eastern Europe." Geosciences 10, no. 11 (October 24, 2020): 420. http://dx.doi.org/10.3390/geosciences10110420.

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An active process of the invasion of woody vegetation, resulting in the formation of light forests, has been observed in predominantly herbaceous small dry valleys of the forest-steppe uplands of the East European Plain over the past two decades. This paper investigates the spatial features of the density of trees in such light forests and its relationship with relief parameters. The Belgorod Region, one of the administrative regions of European Russia, was chosen as a reference for the forest-steppe zone of the plain. The correlation between some relief characteristics (the height, slope, slo

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Mellon, Michael T., Christopher P. Mckay, and Jennifer L. Heldmann. "Polygonal ground in the McMurdo Dry Valleys of Antarctica and its relationship to ice-table depth and the recent Antarctic climate history." Antarctic Science 26, no. 4 (November 26, 2013): 413–26. http://dx.doi.org/10.1017/s0954102013000710.

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AbstractThe occurrence of dry permafrost overlying ice-rich permafrost is unique to the Antarctic Dry Valleys on Earth and to the high latitudes of Mars. The stability and distribution of this ice are poorly understood and fundamental to understanding the Antarctic climate as far back as a few million years. Polygonal patterned ground is nearly ubiquitous in these regions and is integrally linked to the history of the icy permafrost and climate. We examined the morphology of polygonal ground in Beacon Valley and the Beacon Heights region of the Antarctic Dry Valleys, and show that polygon size

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Clausen, Eric. "Origin of the Redwater River Drainage Basin Determined by Topographic Map Interpretation: Eastern Montana, USA." Journal of Geography and Geology 11, no. 1 (February 26, 2019): 42. http://dx.doi.org/10.5539/jgg.v11n1p42.

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Topographic and geologic map interpretation strongly suggests the eastern Montana Redwater River valley eroded headward across large southeast-oriented ice-marginal melt water floods. The north-oriented Redwater River heads in an area to the south of recognized continental glaciation and flows into the recognized glaciated region before joining the east-oriented Missouri River. Detailed topographic maps show the eastern drainage divide is asymmetric with steeper slopes on the Redwater River side and is crossed by shallow dry valleys linking northwest-oriented Redwater River tributaries with so

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Lyons, W. B., S. W. Tyler, R. A. Wharton, D. M. McKnight, and B. H. Vaughn. "A Late Holocene desiccation of Lake Hoare and Lake Fryxell, McMurdo Dry Valleys, Antarctica." Antarctic Science 10, no. 3 (September 1998): 247–56. http://dx.doi.org/10.1017/s0954102098000340.

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Stable isotope data from waters of lakes in the McMurdo Dry Valleys (MDV) of southern Victoria Land, Antarctica are presented in order to establish the climatic history of this region over the past two millennia. New data from Lake Fryxell and Lake Hoare in Toylor Valley, along with previously published data from Lake Vanda, Wright Valley and Lake Bonney, Taylor Valley are used to infer the recent climatic history of MDV. Lakes Vanda, Fryxell and Bonney appear to have lost their ice covers and evaporated to small, hypersaline ponds by 1000 to ~1200 yr BP. Lake Hoare either desiccated or did no

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Rozprawy doktorskie na temat "Dry Valleys Region"

Peebles, Michael J., and William G. Jr Robertson. "Video Repeater for the Dry Valleys Region of Antarctica." International Foundation for Telemetering, 1993. http://hdl.handle.net/10150/611881.

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International Telemetering Conference Proceedings / October 25-28, 1993 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>A repeater is being designed to provide a telemetry and compressed video link from a remote robot located in the Dry Valleys Region of Antarctica, over a mountain range to California via McMurdo Antarctica. In return a command link is provided for control. A simple task normally, but a bit more difficult when considerations include the unforgiving elements of Antarctica itself. Even with a design using the most robust equipment, tradeoffs must always be made for t

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Sirota, Paul, and n/a. "The effects of solutes, debris and temperature on the shear strength of basal ice in cold-based glaciers." University of Otago. Department of Geography, 2008. http://adt.otago.ac.nz./public/adt-NZDU20081204.142406.

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Isotropic ice samples containing measured concentrations of solutes and debris similar to basal material found in several cold-based glaciers in the McMurdo Dry Valleys, Antarctica, were manufactured in a laboratory and tested for peak shear strength at constant strain rates with a direct-shear device. The shear tests show that differences in rheology and shear strength appear to be related to impurity content and concentration. Debris-laden ice becomes more ductile with greater concentrations of solutes, whereas, low solute-concentrations and high debris-concentrations are associated with inc

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Marchant, David R. "Miocene-Pliocene-Pleistocene paleoclimate and glacial history of the western Dry Valleys region, Antarctica." Thesis, University of Edinburgh, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538081.

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A case is made for the stability of the polar East Antarctic Ice Sheet since middle-Miocene time from landscape development and surficial sediments in the western Dry Valleys region, southern Victoria Land. The alternate hypothesis that calls for repeated Miocene and Pliocene growth and decay of wet-based ice sheets across East Antarctica requires atmospheric temperatures 20"C above present values and late Pliocene ice-sheet overriding of the Transantarctic Mountains. The geomorphological and sedimentological results suggest that these conditions were not met in the western Dry Valleys. Rather

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Kuiper, John R. "The Role of Rainfed Farm Ponds in Sustaining Agriculture and Soil Conservation in the Dry High Valley Region of Cochabamba, Bolivia: Design Considerations and Post Impoundment Analysis." Thesis, University of North Texas, 1999. https://digital.library.unt.edu/ark:/67531/metadc501015/.

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Lack of sufficient water for irrigation is a major problem in and around the valleys surrounding the town of Aiquile, Cochabamba Bolivia. In addition, much of the region is undergoing desertification compounded by drought, deforestation, bad traditional agricultural practices, over grazing and a "torrential" rainfall pattern leading to severe soil erosion and low agricultural production. Between 1992 and 1994, the author constructed a network of 24 small, mostly rainfed farm ponds to increase agricultural production and alleviate soil erosion and land-use problems by improving cover conditions

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Książki na temat "Dry Valleys Region"

Hollingshead, Anne. Day hiking near Sun Valley: With wildflower lists for nearby mountain regions. Ketchum, ID: Idaho Conservation League, 1995.

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Hollingshead, Anne. Day hiking near Sun Valley: With wildflower lists for nearby mountain regions. Sun Valley, Idaho: Gentian Press, 1987.

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Noyalas, Jonathan A. Slavery and Freedom in the Shenandoah Valley during the Civil War Era. University Press of Florida, 2021. http://dx.doi.org/10.5744/florida/9780813066868.001.0001.

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In Slavery and Freedom in the Shenandoah Valley during the Civil War Era, Jonathan Noyalas examines the complexities of life for African Americans in Virginia’s Shenandoah Valley from the antebellum period through Reconstruction. Although the Valley was a site of fierce conflicts during the Civil War and its military activity has been extensively studied, scholars have largely ignored the black experience in the region until now. Correcting previous assumptions that slavery was not important to the Valley, and that enslaved people were treated better there than in other parts of the South, Jon

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Laneri, Nicola, and Mark Schwartz. Southeastern and Eastern Anatolia in the Middle Bronze Age. Edited by Gregory McMahon and Sharon Steadman. Oxford University Press, 2012. http://dx.doi.org/10.1093/oxfordhb/9780195376142.013.0014.

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This article presents data on the Middle Bronze Age (MBA) of southeastern and eastern Anatolia, which were more resilient than northern Mesopotamia and never endured the collapse suffered there at the end of the third millennium BCE. On the contrary, the mixed subsistence economy and the relatively lower levels of urbanism and reliance on intensive dry farming made these Anatolian societies more resilient and less prone to ecological disaster. Thus, the climatic catastrophe that devastated numerous urban centers of northern Mesopotamia did not affect the Anatolian regions, which instead show c

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Hansen, Christine, and Tom Griffiths. Living with Fire. CSIRO Publishing, 2012. http://dx.doi.org/10.1071/9780643104808.

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Within the Yarra River catchment area nestles the valley of Steels Creek, a small shallow basin in the lee of Kinglake plateau and the Great Dividing Range. The escarpment walls of the range drop in a series of ridges to the valley and form the south-eastern boundary of the Kinglake National Park. The gentle undulations that flow out from the valley stretch into the productive and picturesque landscape of Victoria’s famous wine growing district, the Yarra Valley.  Late on the afternoon of 7 February 2009, the day that came to be known as Black Saturday, the Kinglake plateau carried a mas

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Tevis, Yvonne P. The Coachella Valley Preserve: The Struggle for a Desert Wetlands (Great Issues of the Day, No. 5). Borgo Press, 1995.

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Dyson, Tim. A Population History of India. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198829058.001.0001.

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This book provides an account of the size and characteristics of India’s population stretching from the arrival of modern human beings until the present day. The periods considered include those of: the millennia that were occupied by hunting and gathering; the Indus valley civilization; the opening-up of the Ganges basin; and the eras of the Delhi Sultanate, Mughal Empire, and British colonial rule. The book also devotes substantial consideration to the unprecedented changes that have occurred in India since 1947. With reference to these and other periods, key topics addressed include: the sc

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Verschuur, Gerrit L. Impact! Oxford University Press, 1996. http://dx.doi.org/10.1093/oso/9780195101058.001.0001.

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Most scientists now agree that some sixty-five million years ago, an immense comet slammed into the Yucatan, detonating a blast twenty million times more powerful than the largest hydrogen bomb, punching a hole ten miles deep in the earth. Trillions of tons of rock were vaporized and launched into the atmosphere. For a thousand miles in all directions, vegetation burst into flames. There were tremendous blast waves, searing winds, showers of molten matter from the sky, earthquakes, and a terrible darkness that cut out sunlight for a year, enveloping the planet in freezing cold. Thousands of sp

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Części książek na temat "Dry Valleys Region"

Qinye, Yang. "Dry Valleys in Hengduan Mts Region." In Mountain Geoecology and Sustainable Development of the Tibetan Plateau, 283–302. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-010-0965-2_14.

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Curtis, Garniss H., and Clyde Wahrhaftig. "Trip log day 5 (July 5, 1989): Monticello Dam-Napa Valley." In Geology of San Francisco and Vicinity: San Francisco Bay Region, California: July 1–7, 1989, 54–56. Washington, D. C.: American Geophysical Union, 1989. http://dx.doi.org/10.1029/ft105p0054.

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Alexander, Earl B., Roger G. Coleman, Todd Keeler-Wolfe, and Susan P. Harrison. "Southern California Coast Ranges, Domain 3." In Serpentine Geoecology of Western North America. Oxford University Press, 2007. http://dx.doi.org/10.1093/oso/9780195165081.003.0021.

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The Southern California Coast Range domain is a mountainous region with subparallel ridges aligned north–south, or more precisely north, northwest–south, southeast, and with intervening valleys that are controlled by strike-slip faulting. It extends about 400 km from the Golden Gate at the entrance to San Francisco Bay south to the Transverse Ranges that have east–west trending ridges. The domain corresponds to a physiographic region about 400 km long and 100 km wide that is bound by the Pacific Ocean on the west, the Great Valley of California on the east, on the north by the drainage outlet of the Sacramento and San Joaquin Rivers through the Carquinas Straight and San Pablo Bay, and on the south by the Transverse Ranges. Ridges in the Southern California Coast Ranges generally have nearly level crests (Page et al. 1997), but they range considerably in height up to about 1500 m on some of the higher peaks. No streams from the Great Valley cross the Southern California Coast Ranges to the Ocean; the Great Valley drains through the Carquinez Straight and Golden Gate at the north end of these ranges. The larger streams in the Southern California Coast Ranges drain from the Santa Clara Valley, Salinas Valley, and Cuyama Valley to the San Francisco, Monterey, and San Luis Obispo bays. Only relatively small streams drain to the Great Valley, but some of them have large alluvial fans in the valley. There are many Tertiary-faultbound valleys and basins among the mountain ranges. Some of the more prominent basins are the Santa Maria basin, Carrizo Plains, Paso Robles basin, and Watsonville basin. Serpentine is scattered in relatively small bodies throughout the domain and is concentrated along some of the major faults and in the New Idria area (locality 3-12). Climates range from cool and foggy along the coast to warm inland, with hot and dry summers inland from the fog belt.

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Welch, Kathleen A., and W. Berry Lyons. "Climate and Hydrologic Variations and Implications for Lake and Stream Ecological Response in the McMurdo Dry Valleys, Antarctica." In Climate Variability and Ecosystem Response in Long-Term Ecological Research Sites. Oxford University Press, 2003. http://dx.doi.org/10.1093/oso/9780195150599.003.0019.

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Because polar regions may amplify what would be considered small to moderate climate changes at lower latitudes, Weller (1998) proposed that the monitoring of high latitude regions should yield early evidence of global climate change. In addition to the climate changes themselves, the connections between the polar regions and the lower latitudes have recently become of great interest to meteorologists and paleoclimatologists alike. In the southern polar regions, the direct monitoring of important climatic variables has taken place only for the last few decades, largely because of their remoteness. This of course limits the extent to which polar records can be related to low latitude records, even at multiyear to decadal timescales. Climatologists and ecologists are faced with the problem that, even though these high latitude regions may provide important clues to global climatic change, the lengths of available records are relatively short. The McMurdo Dry Valleys Long-Term Ecological Research (MCM LTER) program was established in 1993. This program built on the monitoring begun in the late 1960s by researchers from New Zealand, who collected records of climate, lake level, and stream discharge in the Wright Valley, Antarctica. Griffith Taylor’s field party obtained the first data related to lake level in 1903 as part of Scott’s Discovery expedition. Analysis of the more recent data from the New Zealand Antarctic and MCM LTER programs when compared to the 1903 datum indicates that the first half of the twentieth century was a period of steadily increasing streamflows, followed in the last half of the century by streamflows that have resulted in more slowly increasing or stable lake levels (Bomblies et al. 2001). Thus, meteorological and hydrological records generated by the MCM LTER research team, when coupled with past data and the ecological information currently being obtained, provide the first detailed attempt to understand the connection between ecosystem structure and function and climatic change in this region of Antarctica. In addition, the program helps to fill an important gap in the overall understanding of climatic variability in Antarctica.

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Barker, Graeme. "Central and South Asia: theWheat/Rice Frontier." In The Agricultural Revolution in Prehistory. Oxford University Press, 2006. http://dx.doi.org/10.1093/oso/9780199281091.003.0010.

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This chapter intentionally overlaps with Chapter 4 in its geographical scope, as there is no clear boundary between South-West and South Asia. Western Asiatic landforms—mountain ranges, alluvial valleys, semi-arid steppe, and desert—extend eastwards from the Iranian plateau beyond the Caspian Sea into Turkmenistan in Central Asia, and there are similar environments in South Asia from Baluchistan (western Pakistan) and the Indus valley into north-west India as far east as the Aravalli hills (Fig. 5.1). Rainfall increases steadily moving eastwards across the vast and immensely fertile alluvial plains of northern India. The north-east (Bengal, Assam, Bhutan) is tropical, with tropical conditions also extending down the eastern coast of the peninsula and up the west coast as far as Bombay. Today the great majority of the rural population of the region lives by agriculture, though many farmers also hunt game if they have the opportunity. The ‘Eurasian’ farming system predominates in the western part of the region: the cultivation of crops sown in the winter and harvested in the spring (rabi), such as barley, wheat, oats, lentils, chickpeas, jujube, mustard, and grass peas, integrated with animal husbandry based especially on sheep, goats, and cattle. A second system (kharif ) takes advantage of the summer monsoon rains: crops are sown in the late spring at the start of the monsoon and harvested in the autumn. Rice (Oryza sativa) is the main summer or kharif crop (though millets and pulses are also key staples), grown wherever its considerable moisture needs can be met, commonly by rainfall in upland swidden systems and on the lowlands by flooding bunded or dyked fields in paddy systems. The systems are referred to as ‘dry’ and ‘wet’ rice farming respectively. Rice is the primary staple in the eastern or tropical zone receiving the greatest amount of summer monsoon rain. This extends from the Ganges (Ganga) valley eastwards through Assam into Myanmar (Burma) and East Asia. There are something like 100,000 varieties of domesticated Asian rice, but the main one grown in the region is Oryza indica. A wide range of millets is also grown as summer crops in rain-fed systems throughout the semi-arid tropical regions of South Asia, including sorghum or ‘great millet’, finger millet, pearl or bullrush millet, proso or common millet, foxtail millet, bristley foxtail, browntopmillet, kodo millet, littlemillet, and sawamillet.

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Badmaev, Nimazhap Bayarzhapovich, Aleksandr Vladimirovich Bazarov, and Roman Sergeevich Sychev. "Forest Fire Danger Assessment Using Meteorological Trends." In Predicting, Monitoring, and Assessing Forest Fire Dangers and Risks, 183–208. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1867-0.ch008.

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The chapter presents the results of research in the Republic of Buryatia, where the number and area of fires have increased over the past 20 years due to the rise in temperature and aridity. Most of the fires are registered in the large river valleys where pine forests are formed, which have low soil moisture capacity. Fewer fires occurred on the Eastern Sayans, Khamar-Daban ridges, and the Stanovoye Highlands, where the precipitation maximum falls. A correlation analysis was carried out between meteorological parameters and fires in climate-contrasting forests. The lack of precipitation at the end of the previous summer, combined with the hot and dry spring weather of the current year, have a significant impact on fires in the arid ecosystems of the Transbaikal middle mountains. In the humid coastal climate of the Eastern Baikal region, the high temperature of the air determines the fires, but there is no precipitation.

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Juo, Anthony S. R., and Kathrin Franzluebbers. "Properties and Management of Smectitic Soils." In Tropical Soils. Oxford University Press, 2003. http://dx.doi.org/10.1093/oso/9780195115987.003.0016.

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Smectitic soils of the tropics are medium- to fine-textured alluvial soils containing moderate to large amounts (20% or more) of smectite, a shrinking and swelling clay mineral, in the clay fraction. Small to moderate amounts of other layer silicate minerals, such as illite, chlorite, vermiculite, and kaolinite, are also present in the clay fraction. Smectitic soils have moderate to high values of CEC (10-50 cmol/kg of soil), high base saturation, and high water-retention capacity. These soils are usually developed on alluvial materials rich in basic cations, especially Mg. Smectitic soils commonly occur on alluvial plains in river valleys and deltas as well as in inland depressions. In the wetter tropics, large areas of smectitic soils are found in tropical Asia, especially Vietnam, Thailand, and Myanmar (Burma). These young alluvial soils are rich in nutrient-bearing weatherable minerals, such as micas, feldspars, and hornblende. Smectitic soils on the alluvial plains and inland valleys have a shallow groundwater table, and some soils are flooded during the rainy season. Thus, they are best suited for rice cultivation. For example, in the flood plains along the Mekong and Chao Phraya rivers of the Indo- China peninsula, mineral-rich deposits from annual flooding are able to maintain relatively high rice yields with little or no additional nutrient inputs. Smectitic soils occurring in seasonally flooded coastal mangrove swamps are known as acid sulfate soils. These soils are used for cultivation of swamp rice and floating rice during the rainy season, depending upon the depth of flooding by fresh water. In drier regions, clayey smectitic soils (mainly Vertisols) often exhibit large cracks during the dry season and become very sticky and difficult to work with during the rainy season. In the drier tropics, large areas of clayey smectitic soils are found in central India, central Sudan, southern Ghana, and in the Lake Chad region of central Africa. Clayey smectitic soils are usually found in the inland depressions scattered throughout the drier regions of West, East and Central Africa. Because of their high chemical fertility, these soils are important soils for cropping and grazing in the drier tropics.

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Woodward, Jamie. "Editorial Introduction." In The Physical Geography of the Mediterranean. Oxford University Press, 2009. http://dx.doi.org/10.1093/oso/9780199268030.003.0017.

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The nine chapters in Part II build on the physical, biological, and theoretical frameworks set out in Part I, but with a focus on process regimes and change in specific environments. With its emphasis on much larger spatial scales, Part I showed how the Mediterranean basin is a product of long-term interactions between all components of the Earth system. It showed how these interactions drive landscape and ecosystem processes and environmental change. The chapters in Part II examine Mediterranean-wide patterns too, but explore process interactions in sharper resolution and across scales ranging from individual soil profiles, hillslopes, and habitats to larger landscape elements including lake basins, river valleys, dune systems, and coastal plains. Much of the region is dominated by mountains and many process interactions are especially vivid in the Mediterranean because of the erosive energy available in steep and active tectonic settings, and the presence of soft rocks vulnerable to mass movements and water erosion. Abrupt transitions from uplands to lowlands— and the differential response to tectonic uplift of hard and soft rock terrains—are notable features. The seasonally dry climate can leave bare slopes exposed to high intensity rains, and river sediment yields are typically much higher than in adjacent regions. It can be argued that the Quaternary records of these interactions are more varied and better preserved than in any other part of the world. Recent major advances include the development of high resolution proxy climate data from speleothems and robust dating frameworks for fluvial, glacial, and palaeoecological records. These records have provided important new insights into the tempo of climate, landscape, and ecosystem change in the Mediterranean region and beyond. A variety of sedimentary archives also provide insights into the changing nature and intensity of human action in the Mediterranean landscape during the course of the Pleistocene and Holocene and this is a core theme of Part II. The region is unique because of the very early and widespread impact of humans in landscape and ecosystem change—and the richness of the archaeological and geological archives in which it is chronicled.

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Searle, Mike. "Roof of the World: Tibet, Pamirs." In Colliding Continents. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780199653003.003.0016.

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The Tibetan Plateau is by far the largest region of high elevation, averaging just above 5,000 metres above sea level, and the thickest crust, between 70 and 90 kilometres thick, anywhere in the world. This huge plateau region is very flat—lying in the internally drained parts of the Chang Tang in north and central Tibet, but in parts of the externally drained eastern Tibet, three or four mountain ranges larger and higher than the Alps rise above the frozen plateau. Some of the world’s largest and longest mountain ranges border the plateau, the ‘flaming mountains’ of the Tien Shan along the north-west, the Kun Lun along the north, the Longmen Shan in the east, and of course the mighty Himalaya forming the southern border of the plateau. The great trans-Himalayan mountain ranges of the Pamir and Karakoram are geologically part of the Asian plate and western Tibet but, as we have noted before, unlike Tibet, these ranges have incredibly high relief with 7- and 8-kilometre-high mountains and deeply eroded rivers and glacial valleys. The western part of the Tibetan Plateau is the highest, driest, and wildest area of Tibet. Here there is almost no rainfall and rivers that carry run-off from the bordering mountain ranges simply evaporate into saltpans or disappear underground. Rivers draining the Kun Lun flow north into the Takla Makan Desert, forming seasonal marshlands in the wet season and a dusty desert when the rivers run dry. The discovery of fossil tropical leaves, palm tree trunks, and even bones from miniature Miocene horses suggest that the climate may have been wetter in the past, but this is also dependent on the rise of the plateau. Exactly when Tibet rose to its present elevation is a matter of great debate. Nowadays the Indian Ocean monsoon winds sweep moisture-laden air over the Indian sub-continent during the summer months (late June–September). All the moisture is dumped as the summer monsoon, the torrential rains that sweep across India from south-east to north-west.

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Fountain, Andrew G., and W. Berry Lyons. "Century- to Millennial-Scale Climate Change and Ecosystem Response in Taylor Valley, Antarctica." In Climate Variability and Ecosystem Response in Long-Term Ecological Research Sites. Oxford University Press, 2003. http://dx.doi.org/10.1093/oso/9780195150599.003.0031.

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The view of climate change during the Pleistocene and the Holocene was very much different a mere decade ago. With the collection and detailed analyses of ice core records from both Greenland and Antarctica in the early and mid-1990s, respectively, the collective view of climate variability during this time period has changed dramatically. During the Pleistocene, at least as far back as 450,000 years b.p., abrupt and severe temperature fluctuations were a regular occurrence rather than the exception (Mayewski et al. 1996, 1998; Petit et al. 1999). During the Pleistocene, these rapid and large climatic fluctuations, initially identified in the ice core records, have been verified in both marine and lacustrine sediments as well (Bond et al. 1993; Grimm et al. 1993), suggesting large-scale (hemispheric to global) climate restructuring over very short periods of time (Mayewski et al. 1997). Similar types of climatic fluctuations, but with smaller amplitudes, have also occurred during the Holocene (O’Brien et al. 1995; Bond et al. 1997; Arz et al. 2001). What were the biological responses to these changes in temperature, precipitation, and atmospheric chemistry? We must answer this question if we are to understand the century- to millennial-scale influence of climate on the structure and function of ecosystems. Because the polar regions are thought to be amplifiers of global climate change, these regions are ideal for investigating the response of ecological systems to, what in temperate regions might be considered, small-scale climatic variation. Our knowledge of past climatic variations in Antarctica comes from different types of proxy records, including ice core, geologic, and marine (Lyons et al. 1997). It is clear, however, that coastal Antarctica may respond to oceanic, atmospheric, and ice sheet–based climatic “drivers,” and therefore ice-free regions, such as the Mc- Murdo Dry Valleys, may respond to climate change in a much more complex manner than previously thought (R. Poreda, unpubl. data 2001). Since the initiation of the McMurdo Dry Valleys Long-Term Ecological Research program (MCM) in 1993, there has been a keen interest not only in the dynamics of the present day ecosystem, but also in the legacies produced via past climatic variation on the ecosystem. In this chapter we examine the current structure and function of the dry valleys ecosystem from the perspective of our work centered in Taylor Valley.

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Streszczenia konferencji na temat "Dry Valleys Region"

Haproff, Peter, Drew Levy, Andrew V. Zuza, and Jordan D. Burkey. "PRELIMINARY CONSTRAINTS ON THE QUATERNARY SLIP HISTORIES OF THE EUREKA VALLEY FAULT AND THE DRY MOUNTAIN FAULT WITHIN THE EASTERN CALIFORNIA SHEAR ZONE, DEATH VALLEY REGION." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-353395.

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Wong, Kaufui V., and Sarmad Chaudhry. "Climate Change Aggravates the Energy-Water-Food Nexus." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-36502.

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There are regions in the world experiencing the energy-food-water nexus problems. These regions tend to have high population density, economy that depends on agriculture and climates with lower annual rainfall that may have been adversely affected by climate change. A case in point is the river basin of the Indus. The Indus River is a large and important river running through four countries in East Asia and South Asia: China, India, Afghanistan, and Pakistan. The region is highly dependent on water for both food and energy. The interlinkage of these three components is the cause for the energy

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Deleanu, Lorena, Gabriel Andrei, and Laura Maftei. "Surface Characterization of Polymer Composite Using Bearing Area Curve." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-25330.

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This paper presents an analysis of several 3D parameters based on bearing area curve in order to use the information for establishing the influence of sliding regime against steel on the tribological behavior of a composite class with polyamide matrix and 1% of black carbon. There were done pin-on-disk tests for different concentrations of micro glass spheres (MGS): 2.5, 5, 10, 20, 30 and 50% (wt), respectively. The polymer was tested under similar conditions in order to have a reference basis and to point out the improvement in tribological behavior when adding this reinforcement material. Th

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Matsui, Y., T. Suzuki, P. Deevanhxay, S. Tsushima, and S. Hirai. "Crack Generation in Catalyst Layer and Micro Porous Layer by Wet-Dry Cycles and its Impact on PEMFC Performance." In ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 7th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fuelcell2013-18099.

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In this study, we focused on nano- and micro-scale cracks in the catalyst layer and the micro porous layer of polymer electrolyte membrane fuel cells (PEMFCs) and its impact on cell performance. We applied wet-dry cycles to a conventional test cell to investigate crack generation in the catalyst layer and the micro porous layer. Wet-dry cycles, in which cell temperature was kept at 353K with high- and low-humidified gas alternately applied to the cell, potentially induced mechanical stress to a membrane electrode assembly (MEA) due to membrane hydration and dehydration. As a result, significan

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Lal, Manish Kumar, Tae Hyung Kim, and Darrin M. Singleton. "Data Science Use Case for Brownfield Optimization - A Case Study." In SPE Western Regional Meeting. SPE, 2021. http://dx.doi.org/10.2118/200781-ms.

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Abstract Data Science is the current gold rush. While many industries have benefitted from applications of data science, including machine learning and Artificial Intelligence (AI), the applications in upstream oil and gas are still somewhat limited. Some examples of applications of AI include seismic interpretations, facility optimization, and data driven modeling – forecasting. While still naïve, we will explore cases where data science can be used in the day to day field optimization and development. The Midway Sunset (MWSS) field in San Joaquin Valley, California has over 100 years of hist

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MOSIEJ, Józef, and Teresa SUCHECKA. "THE ROLE OF IRRIGATION IN RIVER VALLEYS TO DEVELOP WATER QUALITY, PRODUCTION OF BIOMASS AND SUSTAINABLE RURAL DEVELOPMENT - CASE STUDY." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.076.

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Ner river and its valley for over 170 years has been receiver for sewages from the city of Łódź. The natural system of this region (on the border of the watershed location, limitations of water supplies sources, lack of bigger natural rivers) in connection to city growth, lead to forming of specific system involving an agglomeration and water supplies system as well as wastewaters utilization system. The Ner river valley has the great potential to be effective in production biomass for energy purposes. Irrigation with polluted Ner river water cover fast growing plants high water and nutritiona

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Davis, John C., Mike Jones, and John Roderique. "Planning for Greater Levels of Diversion That Including Energy Recovery for the Mojave Desert and Mountain Recycling Authority, California Region." In 17th Annual North American Waste-to-Energy Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/nawtec17-2342.

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The Mojave Desert and Mountain Recycling Authority is a California Joint Powers Authority (the JPA), consisting of nine communities in California’s San Bernardino County high desert and mountain region. In August 2008 the JPA contracted with Gershman, Brickner & Bratton, Inc. (GBB) to prepare the Victor Valley Resource Management Strategy (Resource Management Strategy). Working with RRT Design and Construction, Inc. (RRT), GBB prepared a coordinated forward-looking strategy to guide the JPA’s future program and facilities decisions. The Resource Management Strategy focused on the Town of A

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Wu, Hong, S. Nasir, W. F. Ng, and H. K. Moon. "Showerhead Film Cooling Performance of a Transonic Turbine Vane at High Freestream Turbulence (Tu = 16%): 3-D CFD and Comparison With Experiment." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-67782.

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The main objective of the study reported here is to use 3-D CFD to calculate and explain adiabatic film cooling effectiveness and Nusselt number distributions downstream of the showerhead film cooling rows of a turbine vane at high freestream turbulence and realistic exit Reynolds number/Mach number condition. The paper discusses a three-simulations technique to calculate vane surface recovery temperature, adiabatic wall temperature, and surface Nusselt number to completely characterize film cooling performance in a high speed flow. The RANS based ν2-f turbulence model, originally suggested by

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Raporty organizacyjne na temat "Dry Valleys Region"

Wright, Kirsten. Collecting Plant Phenology Data In Imperiled Oregon White Oak Ecosystems: Analysis and Recommendations for Metro. Portland State University, March 2020. http://dx.doi.org/10.15760/mem.64.

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Highly imperiled Oregon white oak ecosystems are a regional conservation priority of numerous organizations, including Oregon Metro, a regional government serving over one million people in the Portland area. Previously dominant systems in the Pacific Northwest, upland prairie and oak woodlands are now experiencing significant threat, with only 2% remaining in the Willamette Valley in small fragments (Hulse et al. 2002). These fragments are of high conservation value because of the rich biodiversity they support, including rare and endemic species, such as Delphinium leucophaeum (Oregon Depart

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